Machinery Malfunctions. Test 6

What is the function of item 'PC' ?

Pressure Controller activating 3-way valve solenoid
Pressure Container admitting air to air bottle
Pressure Container activating automatic pressure release valve
Piston Controller activating compressor piston movement

The amount, condition and appearance of liquid collecting in bilges over time is a sign of _____ ?

specific system losses.
sloppy engine room management.
leakage or overflow.
flooding taking place.

When taking a set of crankshaft deflections the + sign is indicated, example +4. This means that _____

the crankpin location is 4/100 mm out of centre.
one main bearing on one side is 4/100 mm bigger than the other.
the crankwebs have opened up by 4/100 mm.
the crankwebs have closed in by 4/100 mm.

What is item 'U' and how does it act on item 'S' ?

Item 'U' is the uplifter of the air bottle's safety valve.
Item 'U' is the upper pressure limit valve activating the solenoid.
Item 'U' is the unloader lifting the compressor suction valve.
Item 'U' is the activator for the safety release valve.

When a new cylinder liner is fitted to a 2-stroke engine, which of the following steps should be taken ? I. Increase the cylinder oil flow. II. Reduce the cylinder load. III. Reduce the oil flow.

I and II
I, II and III
II and III
I and III

Which are the parameters that steer the automatic level control system of the boiler shown here ?

Water level and steam consumption.
The level controller.
Feedvalve and feed by-pass valve.
The level transmitter.

After water-washing the turbocharger exhaust side, the blower starts to vibrate. What has happened?

Water drain for washing system is clogged
The rotor blades are damaged or the blades are not properly cleaned
Inlet filter partly clogged.
Foundation bolts for the blower unit are loose

In the operation shown what is being checked?

Axial position of the compressor impeller.
Turbine wheel/nozzle clearance.
Axial movement in the thrust bearings.
Axial location of the labrynth gland.

If the performance of a centrifugal pump deteriorates over time (tons/hour x height in metres) it is usually due to _____

cavitation of the impeller.
excessive wear between impeller and wear ring.
condition of the ball bearing.
condition of the pump housing.

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Machinery Malfunctions. Test 6

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